Eclipse 2019: Why is the lunar eclipse turning the moon red tonight? | 1/20/2019 | Staff
baileyboo (Posted by) Level 3
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The Royal Observatory explains: “A penumbral lunar eclipse occurs when the Moon travels only through the outer, fainter part of the Earth's shadow, or 'penumbra'.

“This happens when the Earth moves between the Sun and Moon but the three do not form a perfectly straight line.

Penumbra - Darkening - Moon - Surface - Moon

“The penumbra causes only a slight darkening of the Moon's surface, with the Moon still exposed to some...
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